Crystallization of Ferrite Powder Using Ultrasonic Wave

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J. Korean Ceram. Soc. > Volume 37(2); 2000 > Article

Journal of the Korean Ceramic Society 2000;37(2): 181.

초음파를 이용한 페라이트 분말의 결정화

신현창, 오재희¹, 이재춘², 최승철

아주대학교 재료공학과
¹인하대학교 무기재료공학과
²명지대학교 무기재료공학과

Crystallization of Ferrite Powder Using Ultrasonic Wave

ABSTRACT

A new technique capable of accelerating the crystallization of ferrite powder at low temperature is developed. Effects of the ultrasonic waves on the crystallization were studied for ferrite powders prepared using the co-precipitation method. The crystallization of the ferrite powders exposed to the ultrasonic waves were characterized by the XRD. The amorphous ferrite powders prepared using the co-precipitation method were crystallized as a result of the exposure to the ultrasonic waves for 5h and the crystallization of the ferrite powders became more enhanced in proportion to the time exposed. The ferrite powder exposed to the ultrasonic waves for 25h had higher crystallinity a larger specific surface area than the ferrite powder calcined at 500$^{circ}C$ for 2h.

Key words: Ultrasonic wave exposing, Crystallization, Ferrite powder processing